Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

The annotation already declares readOnlyHint=true, so the safety profile is covered. The description adds useful behavioral context beyond the annotation: it only returns published versions and orders them most recent first. This helps the agent understand what data to expect without contradicting the read-only nature.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, focused sentence with no redundant words. It front-loads the key action and scope, and the ordering behavior is included efficiently. Every word earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple read-only list tool with no output schema, the description is adequate. It specifies that only published versions are returned and the ordering, which covers the main expectations. It does not mention pagination or the exact response structure, but these are not critical for a tool of this simplicity, and the readOnlyHint covers side-effect concerns.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema fully describes both parameters (journey_id and notification_id) with clear descriptions, so schema coverage is 100%. The description does not add any additional meaning to the parameters, but the baseline of 3 is appropriate because the schema handles the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb 'list', the resource 'published versions of a journey-scoped notification template', and adds the ordering constraint 'most recent first'. This distinguishes it from generic list tools like list_notification_versions (which are not journey-scoped) and list_journey_versions (which likely list journey versions rather than notification template versions). The purpose is unambiguous.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives such as list_notification_versions or list_journey_versions. The description implies a specific scope but does not explicitly state when this tool is preferred or when to avoid it. Given the large sibling list with overlapping names, an agent could easily pick the wrong tool without clearer differentiation.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.